BlueMap is a tool that generates 3d-maps of your Minecraft worlds and displays them in your browser. Take a look at [this demo](https://bluecolored.de/bluemap). It is really easy to set up - almost plug-and-play - if you use the integrated web-server (optional).
The plugins/mods automatically update your map as soon as something changes in your world, as well as rendering newly generated terrain and managing the render-tasks.
It is however already quite stable and usable. There are just some features still missing, and some blocks - especially tile-entities - will not render correctly/at all.
BlueMap can be used on the command-line, or as a plugin/mod for your Sponge/Spigot/Paper/Forge/Fabric-Server. Read the [wiki](https://github.com/BlueMap-Minecraft/BlueMap/wiki) to get started!
Here is a *(surely incomplete)* list of things that i want to include in future versions. *(They are not in any specific order. There is no guarantee that any of those things will ever be included.)*